Supporting Financial Information - Other Income (Expense) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2015	Sep. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Interest expense, net									$ (80)	$ (99)
Amortization of deferred financing costs									0	(10)
Change in value of financial instruments									0	99
Miscellaneous other income (expense), net									824	6
Other income (expense) net	$ 1,466	$ (34)	$ (651)	$ (36)	$ (27)	$ (17)	$ (27)	$ 67	744	(4)
Settlement of legacy payroll tax issue, net									$ (1,477)	$ 0
Accrued interest and penalties			$ (629)